#379FCC
Closest named color: Turquoise Blue (#06B1C4). oklch(66.3% 0.114 231), rgb(55, 159, 204).
Aa
Black text reads best on this color (6.99:1).
About this color
#379FCC is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.114 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.057 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #379FCC |
| RGB | rgb(55, 159, 204) |
| HSL | hsl(198, 59%, 51%) |
| OKLCH | oklch(66.3% 0.114 231) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #379FCC | 3.00:1 | AA large text | Lc -61.7 | Content text, not long reading |
| Black text on #379FCC | 6.99:1 | AA | Lc 47.7 | Large or bold text, headings |
| #379FCC text on white | 3.00:1 | AA large text | Lc 56.4 | Large or bold text, headings |
| #379FCC text on black | 6.99:1 | AA | Lc -45.4 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C5DDEA
oklch(88.4% 0.031 231.3)
-
Step 300
300
#9CC8DE
oklch(80.9% 0.056 229.9)
-
Step 400
400
#62ABCE
oklch(70.7% 0.089 230.6)
-
Step 500
500 (this color)
#379FCC
oklch(66.3% 0.114 231)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#034862
oklch(37.7% 0.075 231.3)
-
Step 950
950
#082A39
oklch(26.9% 0.047 231.5)
#379FCC with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #889DCE | 0.077 |
| Deuteranopia (no green cones) | #748ECB | 0.067 |
| Tritanopia (no blue cones) | #00ABAE | 0.067 |
| Achromatopsia (no color) | #959595 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #379FCC
#379FCC
oklch(66.3% 0.114 231)
- #CA7D4F
#CA7D4F
oklch(66.2% 0.114 50.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #379FCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.057
- Faded Blue #658CBB ΔE 0.059
- Greyblue #77A1B5 ΔE 0.064
- Dark Sky Blue #448EE4 ΔE 0.066
- Chefchaouen Blue #4895EF ΔE 0.067
- Cadet Blue #5F9EA0 ΔE 0.069
- Blue NCS #118AB2 ΔE 0.071
- Cornflower Blue #6495ED ΔE 0.073
Use #379FCC in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.